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dc.contributor.author Chartier, Alex T.
dc.contributor.author Smith, Nathan D.
dc.contributor.author Mitchell, Cathryn N.
dc.contributor.author Jackson, David R.
dc.contributor.author Condor Patilongo, Percy J.
dc.date.accessioned 2018-07-23T12:59:33Z
dc.date.available 2018-07-23T12:59:33Z
dc.date.issued 2012-10-25
dc.identifier.govdoc index-oti2018 (NB)
dc.identifier.issn 2169-9402
dc.identifier.uri http://repositorio.igp.gob.pe/handle/IGP/2019
dc.description En: Journal of Geophysical Research: Space Physics, v. 117, n. A10, (October 2012), p. A10326, 1-9. es_ES
dc.description.abstract "A new technique is presented for the incorporation of ionosonde observations into GPS ionospheric tomography. This approach greatly improves the vertical resolution of the images when using independent incoherent scatter radar observations as ground truth, addressing a traditional weakness of tomographic techniques. Ionosonde observations are used to set vertical basis functions adaptively within the inversion as well as providing electron density information for direct assimilation. The technique also improves slant total electron content (TEC) accuracy in the vicinity of the ionosonde. An experiment was performed in the equatorial region of South America as a 6-day case study due to the availability of incoherent scatter and ionosonde data during this period. Preliminary results were validated with the Jicamarca incoherent scatter radar and independent GPS slant TEC observations. Using the incoherent scatter radar as ground truth for the vertical profile, the new technique reduces mean NmF2 error to 0.07 1011 electrons/m3 compared with 0.27 1011 electrons/m3 in a control run with no ionosonde data, while root-mean square error is now 0.5 1011 electrons/m3 compared with 1.0 1011 electrons/m3 in the control. The new technique also results in 0.1 km mean error in hmF2, compared with 3.9 km in the control, while root-mean square hmF2 error is around 40 km in both cases. Using independent slant TEC observations, the mean error is 0.36 TECU compared with 0.64 TECU in the control run, while root-mean square error is 3.55 TECU down from 4.02 TECU, suggesting the new technique also improves TEC values." es_ES
dc.format application/pdf es_ES
dc.language.iso eng es_ES
dc.publisher Instituto Geofísico del Perú es_ES
dc.rights info:eu-repo/semantics/restrictedAccess es_ES
dc.rights.uri info:eu-repo/semantics/restrictedAccess es_ES
dc.source Repositorio institucional - IGP es_ES
dc.subject Ionósfera es_ES
dc.subject Radar de dispersión incoherente es_ES
dc.subject Electrones es_ES
dc.subject Ionósfera--Observaciones es_ES
dc.subject Densidad de electrones ionosféricos es_ES
dc.subject Radar--Perú--Mediciones es_ES
dc.subject Ionósfera--Investigación--Perú es_ES
dc.subject Física atmosférica es_ES
dc.title The use of ionosondes in GPS ionospheric tomography at low latitudes es_ES
dc.type info:eu-repo/semantics/article es_ES
dc.subject.ocde Atmósfera es_ES
dc.subject.ocde Observación es_ES
dc.subject.ocde Radar es_ES
dc.subject.ocde Medición es_ES
dc.subject.ocde Perú es_ES
dc.subject.ocde Física es_ES
dc.subject.ocde Densidad es_ES
dc.subject.ocde Superconductores es_ES
dc.identifier.journal Journal of Geophysical Research: Space Physics es_ES
dc.description.peer-review Por pares es_ES
dc.identifier.doi 10.1029/2012JA018054 es_ES

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